Single-Cell Transcriptomics Reveals Heterogeneity and Drug Response of Human Colorectal Cancer Organoids

Area of Science:

• Biotechnology
• Cancer Research
• Genomics

Background:

• Organoids are 3D cell cultures mimicking organ structures and functions, serving as in vitro models for stem cell biology and disease.
• Tumor organoids share genetic similarities with patient tumors but their ability to recapitulate cellular heterogeneity is unclear.

Purpose of the Study:

• To investigate transcriptomic profiles of colorectal tumor organoids using single-cell RNA-Seq.
• To assess if tumor organoids recapitulate cellular heterogeneity and drug response observed in patients.

Main Methods:

• Single-cell RNA sequencing (scRNA-Seq) was employed to analyze colorectal tumor organoids.
• Machine learning algorithms were utilized for unbiased clustering of tumor organoid subtypes.
• Organoids were treated with Oxaliplatin to study drug response at the single-cell level.

Main Results:

• Computational analysis confirmed sustained cancer heterogeneity and diverse subtypes within tumor organoids.
• Drug treatment with Oxaliplatin significantly perturbed tumor cell population diversity.
• Single-cell analysis identified depletion of chemosensitive cells and emergence of drug-tolerant populations post-treatment.

Conclusions:

• The organoid model successfully recapitulates the clinical heterogeneity of colorectal tumors.
• Organoids demonstrate the evolution of cellular populations in response to chemotherapy.
• This study validates organoids as a powerful tool for studying cancer heterogeneity and drug response.